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By the time students learn about all the equations for mechanical energy, momentum, impulse and impact force, they often start to confuse the equations with one another. This is a straightforward, simple look at all of those equations and when to use them.
This is an AP Physics 1 Topic. Want Lecture Notes?
Content Times:
0:14 Tacky Sweater Day!
0:22 Conservation of Mechanical Energy
0:54 Work due to Friction equals Change in Mechanical Energy
1:30 Net Work equals change in Kinetic Energy
3:01 Conservation of Momentum does NOT require the work due to friction to be zero
3:28 The initial and final points when dealing with momentum are predetermined
3:56 Impulse does not equal Impact Force
Thank you to Sophie Jones and her family for letting me use six of their sweaters in this video!
Next Video: 2D Conservation of Momentum Example using Air Hockey Discs
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Impulse Comparison of Three Different Demonstrations
Please support me on Patreon!
Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen

Name: Review of Mechanical Energy and Momentum Equations and When To Use Them! Category: Momentum and Collisions Date Added: 2017-02-16 Submitter: Flipping Physics
By the time students learn about all the equations for mechanical energy, momentum, impulse and impact force, they often start to confuse the equations with one another. This is a straightforward, simple look at all of those equations and when to use them.
This is an AP Physics 1 Topic. Want Lecture Notes?
Content Times:
0:14 Tacky Sweater Day!
0:22 Conservation of Mechanical Energy
0:54 Work due to Friction equals Change in Mechanical Energy
1:30 Net Work equals change in Kinetic Energy
3:01 Conservation of Momentum does NOT require the work due to friction to be zero
3:28 The initial and final points when dealing with momentum are predetermined
3:56 Impulse does not equal Impact Force
Thank you to Sophie Jones and her family for letting me use six of their sweaters in this video!
Next Video: 2D Conservation of Momentum Example using Air Hockey Discs
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Impulse Comparison of Three Different Demonstrations
Please support me on Patreon!
Thank you to my Quality Control help: Christopher Becke, Scott Carter and Jennifer Larsen
Review of Mechanical Energy and Momentum Equations and When To Use Them!

A 66 g beanbag is dropped and stops upon impact with the ground. If the impulse measured during the collision is 0.33 N·s, from what height above the ground was the beanbag dropped?
This is an AP Physics 1 Topic. Want Lecture Notes?
Content Times:
0:12 Superhero Day!
0:56 The problem
1:39 Splitting the problem in to two parts
2:32 Using Impulse for part 2
3:30 Using Conservation of Energy for part 1
4:45 What went wrong?
Next Video: Impulse Comparison of Three Different Demonstrations
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Review of Momentum, Impact Force, and Impulse
Thanks to Adam Herz for letting me borrow a VHS copy of our high school video yearbook which he was instrumental in the creating of.
Please support me on Patreon!
Thank you to my Quality Control help: Christopher Becke and Jennifer Larsen

Name: Using Impulse to Calculate Initial Height Category: Momentum and Collisions Date Added: 2017-02-03 Submitter: Flipping Physics
A 66 g beanbag is dropped and stops upon impact with the ground. If the impulse measured during the collision is 0.33 N·s, from what height above the ground was the beanbag dropped?
This is an AP Physics 1 Topic. Want Lecture Notes?
Content Times:
0:12 Superhero Day!
0:56 The problem
1:39 Splitting the problem in to two parts
2:32 Using Impulse for part 2
3:30 Using Conservation of Energy for part 1
4:45 What went wrong?
Next Video: Impulse Comparison of Three Different Demonstrations
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Review of Momentum, Impact Force, and Impulse
Thanks to Adam Herz for letting me borrow a VHS copy of our high school video yearbook which he was instrumental in the creating of.
Please support me on Patreon!
Thank you to my Quality Control help: Christopher Becke and Jennifer Larsen
Using Impulse to Calculate Initial Height

A Toyota Prius is traveling at a constant velocity of 113 km/hr. If an average force of drag of 3.0 x 10^2 N acts on the car, what is the power developed by the engine in horsepower?
Want Lecture Notes? This is an AP Physics 1 Topic.
Content Times:
0:15 The problem
1:18 Which equation to use and why
2:20 Billy solves the problem
3:59 What if the car is moving at 129 km/hr?
Next Video: You Can't Run From Momentum! (a momentum introduction)
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Average Power Delivered by a Car Engine - Example Problem
Please support me on Patreon!

Name: Instantaneous Power Delivered by a Car Engine - Example Problem Category: Work, Energy, Power Date Added: 2017-01-12 Submitter: Flipping Physics
A Toyota Prius is traveling at a constant velocity of 113 km/hr. If an average force of drag of 3.0 x 10^2 N acts on the car, what is the power developed by the engine in horsepower?
Want Lecture Notes? This is an AP Physics 1 Topic.
Content Times:
0:15 The problem
1:18 Which equation to use and why
2:20 Billy solves the problem
3:59 What if the car is moving at 129 km/hr?
Next Video: You Can't Run From Momentum! (a momentum introduction)
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Average Power Delivered by a Car Engine - Example Problem
Please support me on Patreon!
Instantaneous Power Delivered by a Car Engine - Example Problem

An 8.53 kg pumpkin is dropped from a height of 8.91 m. Will the graph of instantaneous power delivered by the force of gravity as a function of _____ be linear? If not, what would you change to make the graph linear? (a) Time, (b) Position.
Want Lecture Notes? This is an AP Physics 1 Topic.
Content Times:
0:12 The example
1:08 The equation for instantaneous power
1:43 Part (a): Solving for velocity as a function of time
2:55 Part (a): Solving for power as a function of time
3:23 Part (a): Is power as a function of time linear?
4:26 Part (a): Graphing power as a function of time
5:03 Part (b): Solving for velocity as a function of position
5:58 Part (b): Solving for power as a function of position
7:02 Part (b): Is power as a function of position linear?
7:38 Part (b): How can we make the graph linear?
8:33 Part (b): Graphing power squared as a function of position
Next Video: Average Power Delivered by a Car Engine - Example Problem
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Average and Instantaneous Power Example
Please support me on Patreon!

Name: Graphing Instantaneous Power Category: Work, Energy, Power Date Added: 2016-06-28 Submitter: Flipping Physics
An 8.53 kg pumpkin is dropped from a height of 8.91 m. Will the graph of instantaneous power delivered by the force of gravity as a function of _____ be linear? If not, what would you change to make the graph linear? (a) Time, (b) Position.
Want Lecture Notes? This is an AP Physics 1 Topic.
Content Times:
0:12 The example
1:08 The equation for instantaneous power
1:43 Part (a): Solving for velocity as a function of time
2:55 Part (a): Solving for power as a function of time
3:23 Part (a): Is power as a function of time linear?
4:26 Part (a): Graphing power as a function of time
5:03 Part (b): Solving for velocity as a function of position
5:58 Part (b): Solving for power as a function of position
7:02 Part (b): Is power as a function of position linear?
7:38 Part (b): How can we make the graph linear?
8:33 Part (b): Graphing power squared as a function of position
Next Video: Average Power Delivered by a Car Engine - Example Problem
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Average and Instantaneous Power Example
Please support me on Patreon!
Graphing Instantaneous Power

Mr.P introduces power which equals work divided by change in time and it also equals force times velocity times cosine theta.
Want Lecture Notes? This is an AP Physics 1 Topic.
Content Times:
0:12 The difference between the two examples
0:43 The definition of power
1:04 Why the work is the same in both examples
2:13 Which example has more power
2:45 The units for power; watts
3:33 The other equation for power
4:46 Horsepower
Next Video: Average and Instantaneous Power Example
Previous Video: Net Work equals Change in Kinetic Energy Problem by Billy
Multilingual? Please help translate Flipping Physics videos!
Are you learning from my videos? Please support me on Patreon!

Name: Introduction to Power Category: Work, Energy, Power Date Added: 2016-05-21 Submitter: Flipping Physics
Mr.P introduces power which equals work divided by change in time and it also equals force times velocity times cosine theta.
Want Lecture Notes? This is an AP Physics 1 Topic.
Content Times:
0:12 The difference between the two examples
0:43 The definition of power
1:04 Why the work is the same in both examples
2:13 Which example has more power
2:45 The units for power; watts
3:33 The other equation for power
4:46 Horsepower
Next Video: Average and Instantaneous Power Example
Previous Video: Net Work equals Change in Kinetic Energy Problem by Billy
Multilingual? Please help translate Flipping Physics videos!
Are you learning from my videos? Please support me on Patreon!
Introduction to Power

Enjoy learning from Billy as he solves a problem using Work due to Friction equals Change in Mechanical Energy. Want Lecture Notes? This is an AP Physics 1 topic.
Content Times:
0:21 The problem
0:51 Work due to Friction equals Change in Mechanical Energy
1:31 Determining the Mechanical Energies
2:44 Solving for the Force Normal
3:52 Relating height final to displacement along the incline
5:03 Substituting in numbers
Next Video: Deriving the Work-Energy Theorem using Calculus
See this problem solved using Conservation of Energy and Newton’s Second Law.
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Introductory Work due to Friction equals Change in Mechanical Energy Problem
1¢/minute

The equation Work due to Friction equals Change in Mechanical Energy can often be confusing for students. This video is a step-by-step introduction in how to use the formula to solve a problem. Want Lecture Notes? This is an AP Physics 1 topic.
Content Times:
0:09 The problem
1:29 Why we can use this equation in this problem
1:52 Expanding the equation
2:29 Identifying Initial and Final Points and the Horizontal Zero Line
3:00 Substituting into the left hand side of the equation
4:05 Deciding which Mechanical Energies are present
4:59 Where did all that Kinetic Energy go?
5:27 Identifying which variables we know and do not know
5:58 Solving for the Force Normal
6:57 Substituting Force Normal back into the original equation
8:09 Why isn’t our answer negative?
Next Video: Work due to Friction equals Change in Mechanical Energy Problem by Billy
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Introduction to Mechanical Energy with Friction
1¢/minute

Name: Work due to Friction equals Change in Mechanical Energy Problem by Billy Category: Work, Energy, Power Date Added: 2016-02-17 Submitter: Flipping Physics
Enjoy learning from Billy as he solves a problem using Work due to Friction equals Change in Mechanical Energy. Want Lecture Notes? This is an AP Physics 1 topic.
Content Times:
0:21 The problem
0:51 Work due to Friction equals Change in Mechanical Energy
1:31 Determining the Mechanical Energies
2:44 Solving for the Force Normal
3:52 Relating height final to displacement along the incline
5:03 Substituting in numbers
Next Video: Deriving the Work-Energy Theorem using Calculus
See this problem solved using Conservation of Energy and Newton’s Second Law.
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Introductory Work due to Friction equals Change in Mechanical Energy Problem
1¢/minute
Work due to Friction equals Change in Mechanical Energy Problem by Billy

Learn how to use Mechanical Energy when the Work done by Friction does not equal zero.
Want Lecture Notes? This is an AP Physics 1 topic.
Content Times:
0:09 When is Conservation of Mechanical energy true?
0:37 Work due to Friction equals the Change in Mechanical Energy
1:57 Determining the angle in the work equation
3:01 When the angle is not 180 degrees
3:50 What if the work done by friction is zero?
4:31 Always identify …
Next Video: Introductory Work due to Friction equals Change in Mechanical Energy Problem
Multilingual? Please help translate Flipping Physics videos!
Previous Video: The Energy Song by Bo
1¢/minute

Name: Introductory Work due to Friction equals Change in Mechanical Energy Problem Category: Work, Energy, Power Date Added: 2016-02-12 Submitter: Flipping Physics
The equation Work due to Friction equals Change in Mechanical Energy can often be confusing for students. This video is a step-by-step introduction in how to use the formula to solve a problem. Want Lecture Notes? This is an AP Physics 1 topic.
Content Times:
0:09 The problem
1:29 Why we can use this equation in this problem
1:52 Expanding the equation
2:29 Identifying Initial and Final Points and the Horizontal Zero Line
3:00 Substituting into the left hand side of the equation
4:05 Deciding which Mechanical Energies are present
4:59 Where did all that Kinetic Energy go?
5:27 Identifying which variables we know and do not know
5:58 Solving for the Force Normal
6:57 Substituting Force Normal back into the original equation
8:09 Why isn’t our answer negative?
Next Video: Work due to Friction equals Change in Mechanical Energy Problem by Billy
Multilingual? Please help translate Flipping Physics videos!
Previous Video: Introduction to Mechanical Energy with Friction
1¢/minute
Introductory Work due to Friction equals Change in Mechanical Energy Problem

Sing and learn about Work and Mechanical Energy with Bo!
Want Lyrics? This is an AP Physics 1 topic.
Multilingual? Please help translate Flipping Physics videos!
Next Video: Introduction to Mechanical Energy with Friction
Previous Video: Conservation of Energy Problem with Friction, an Incline and a Spring by Billy
Hear "The Energy Song" on Soundcloud.
1¢/minute

Name: Introduction to Mechanical Energy with Friction Category: Work, Energy, Power Date Added: 2016-02-08 Submitter: Flipping Physics
Learn how to use Mechanical Energy when the Work done by Friction does not equal zero.
Want Lecture Notes? This is an AP Physics 1 topic.
Content Times:
0:09 When is Conservation of Mechanical energy true?
0:37 Work due to Friction equals the Change in Mechanical Energy
1:57 Determining the angle in the work equation
3:01 When the angle is not 180 degrees
3:50 What if the work done by friction is zero?
4:31 Always identify …
Next Video: Introductory Work due to Friction equals Change in Mechanical Energy Problem
Multilingual? Please help translate Flipping Physics videos!
Previous Video: The Energy Song by Bo
1¢/minute
Introduction to Mechanical Energy with Friction

Name: The Energy Song by Bo Category: Work, Energy, Power Date Added: 2016-01-29 Submitter: Flipping Physics
Sing and learn about Work and Mechanical Energy with Bo!
Want Lyrics? This is an AP Physics 1 topic.
Multilingual? Please help translate Flipping Physics videos!
Next Video: Introduction to Mechanical Energy with Friction
Previous Video: Conservation of Energy Problem with Friction, an Incline and a Spring by Billy
Hear "The Energy Song" on Soundcloud.
1¢/minute
The Energy Song by Bo

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